Digit II – Wrist; Wrist – Elbow

Surface Recording Technique, Orthodromic Study
  • Giuliano Gentili
  • Mario Di Napoli

Original Settings

Sensitivity was 20 μV/division, sweep speed was 1 ms/division. Low frequency filter, high-frequency filter, duration of pulse, rate of pulse, and the machine used were not specified.


This study was performed in the supine position, with the subject lying on a couch and covered with blankets.


Following the orthodromic method, signals were recorded at the wrist and just above the elbow and on the course of the median nerve [1]. For recording at the wrist (R), the active (A) electrode was placed proximally to the distal crease at the wrist; the reference (R) electrode was placed 3 cm proximally to the active electrode (Fig. 1). For recording at the elbow (R), the active (A) electrode was placed proximally to the wrist; the reference (R) electrode was placed proximally to the active electrode (Fig. 2). Distances between recording and stimulating electrodes were not fixed; the authors mapped out the course of the median nerve, before applying the...


Peripheral Neuropathy Conduction Velocity Median Nerve Carpal Tunnel Syndrome Carpal Tunnel 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


  1. 1.
    Gilliatt RW, Sears TA (1958) Sensory nerve action potentials in patients with peripheral nerve lesions. J Neurol Neurosurg Psychiatry 21:109–118PubMedCentralPubMedCrossRefGoogle Scholar
  2. 2.
    Simpson JA (1956) Electrical signs in the diagnosis of carpal tunnel and related syndromes. J Neurol Neurosurg Psychiatry 19:275–280PubMedCentralPubMedCrossRefGoogle Scholar
  3. 3.
    Fox JE, Bangash IH (1996) Conduction velocity in the forearm segment of the median nerve in patients with impaired conduction through the carpal tunnel. Electroencephalogr Clin Neurophysiol 101:192–196PubMedCrossRefGoogle Scholar
  4. 4.
    Watson J, Di Benedetto M, Gale SD (2002) Mixed median nerve forearm conduction velocity in the presence of focal compression neuropathy at the wrist versus peripheral neuropathy. Arch Phys Med Rehabil 83:302–307PubMedCrossRefGoogle Scholar
  5. 5.
    Bland JDP (2000) A neurophysiological grading scale for carpal tunnel syndrome. Muscle Nerve 23:1280–1283PubMedCrossRefGoogle Scholar

Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  • Giuliano Gentili
    • 1
  • Mario Di Napoli
    • 1
  1. 1.Neurological ServiceS. Camillo de’ Lellis General HospitalRietiItaly

Personalised recommendations